vacancy

noun

Etymology: From Late Latin vacantia. Doublet of vacance.

1. An unoccupied position or job.

   “Whenever there is a vacancy in the office of the Vice President, the President shall nominate a Vice President who shall take office upon confirmation by a majority vote of both Houses of Congress.”

2. An available room in a hotel; guest house, etc.
3. Empty space.

   “Sky was set above earth, land ringed with sea, / Chaos retired to its own vacancy ….”

4. A blank mind, unoccupied with thought.

   “...—who has not looked back to the past with that passion of hopelessness, which deems that life can never more be what it has been,—with a consciousness that the dearer emotions are exhausted, while in their place have arisen but vacancy and weariness?”

5. Lack of intelligence or understanding.
6. A defect in a crystal caused by the absence of an atom in a lattice